#=============================================================================
#    Copyright (c) 2017 Paul Fultz II
#    conf.py
#    Distributed under the Boost Software License, Version 1.0. (See accompanying
#    file LICENSE_1_0.txt or copy at http://www.boost.org/LICENSE_1_0.txt)
#==============================================================================
# -*- coding: utf-8 -*-
#
# Boost.HigherOrderFunctions documentation build configuration file, created by
# sphinx-quickstart on Thu Jun  2 00:33:55 2016.
#
# This file is execfile()d with the current directory set to its
# containing dir.
#
# Note that not all possible configuration values are present in this
# autogenerated file.
#
# All configuration values have a default; values that are commented out
# serve to show the default.

# If extensions (or modules to document with autodoc) are in another directory,
# add these directories to sys.path here. If the directory is relative to the
# documentation root, use os.path.abspath to make it absolute, like shown here.
#
import os
import sphinx as sphinxversioncheck
from pkg_resources import parse_version
sphinxversion=""
if parse_version(sphinxversioncheck.__version__) < parse_version("2.0.0"):
    sphinxversion="1"

if sphinxversion=="1":
    from recommonmark.parser import CommonMarkParser
    from recommonmark.transform import AutoStructify
import sphinx_boost

# -- General configuration ------------------------------------------------

# If your documentation needs a minimal Sphinx version, state it here.
#
# needs_sphinx = '1.0'

# Add any Sphinx extension module names here, as strings. They can be
# extensions coming with Sphinx (named 'sphinx.ext.*') or your custom
# ones.
if sphinxversion=="1":
    extensions = [
        # 'sphinx.ext.autodoc',
        # 'sphinx.ext.githubpages',
        'sphinx.ext.autosectionlabel',
    ]
else:
    extensions = [
        'sphinx.ext.autosectionlabel',
        'myst_parser'
    ]

# Add any paths that contain templates here, relative to this directory.
templates_path = ['_templates']

if sphinxversion=="1":
    source_parsers = {
        '.md': CommonMarkParser,
        '.hpp': CommonMarkParser
    }
else:
    source_parsers = {}

# The suffix(es) of source filenames.
# You can specify multiple suffix as a list of string:
#
if sphinxversion=="1":
    source_suffix = ['.rst', '.md', '.hpp']
else:
    source_suffix = {
        '.rst': 'restructuredtext',
        '.txt': 'markdown',
        '.md': 'markdown',
        '.hpp': 'markdown',
    }

# The encoding of source files.
#
# source_encoding = 'utf-8-sig'

# The master toctree document.
master_doc = 'doc/index'

# General information about the project.
project = u'Boost.HigherOrderFunctions'
copyright = u'2016, Paul Fultz II'
author = u'Paul Fultz II'

# The version info for the project you're documenting, acts as replacement for
# |version| and |release|, also used in various other places throughout the
# built documents.
#

def parse_version():
    lines = open('../include/boost/hof/version.hpp').readlines()
    defines = ['BOOST_HOF_VERSION_MAJOR', 'BOOST_HOF_VERSION_MINOR', 'BOOST_HOF_VERSION_PATCH']
    versions = ['0','0','0']
    for line in lines:
        for di, define in enumerate(defines):
            needle = '#define ' + define
            i = line.find(needle)
            if i >= 0:
                versions[di] = line[i+len(needle):].strip()
    final_version = versions[0] + '.' + versions[1]
    if versions[2] != '0': final_version = final_version + '.' + versions[2]
    return final_version




# The short X.Y version.
version = parse_version()
# The full version, including alpha/beta/rc tags.
release = version

# The language for content autogenerated by Sphinx. Refer to documentation
# for a list of supported languages.
#
# This is also used if you do content translation via gettext catalogs.
# Usually you set "language" from the command line for these cases.
language = None

# There are two options for replacing |today|: either, you set today to some
# non-false value, then it is used:
#
# today = ''
#
# Else, today_fmt is used as the format for a strftime call.
#
# today_fmt = '%B %d, %Y'

# List of patterns, relative to source directory, that match files and
# directories to ignore when looking for source files.
# This patterns also effect to html_static_path and html_extra_path
exclude_patterns = [
    '_build', 
    'Thumbs.db', 
    '.DS_Store', 
    'README.md', 
    '**/alias.hpp',
    '**/config.hpp',
    '**/hof.hpp',
    '**/static_def.hpp', 
    '**/test.hpp', 
    '**/detail/*.hpp',
]

# The reST default role (used for this markup: `text`) to use for all
# documents.
#
# default_role = None

# If true, '()' will be appended to :func: etc. cross-reference text.
#
# add_function_parentheses = True

# If true, the current module name will be prepended to all description
# unit titles (such as .. function::).
#
# add_module_names = True

# If true, sectionauthor and moduleauthor directives will be shown in the
# output. They are ignored by default.
#
# show_authors = False

highlight_language = 'cpp'

# The name of the Pygments (syntax highlighting) style to use.
pygments_style = 'tango'

# A list of ignored prefixes for module index sorting.
# modindex_common_prefix = []

# If true, keep warnings as "system message" paragraphs in the built documents.
# keep_warnings = False

# If true, `todo` and `todoList` produce output, else they produce nothing.
todo_include_todos = False


# -- Options for HTML output ----------------------------------------------

# The theme to use for HTML and HTML Help pages.  See the documentation for
# a list of builtin themes.
#
# html_theme = 'alabaster'
html_theme = 'boost'

# Theme options are theme-specific and customize the look and feel of a theme
# further.  For a list of options available for each theme, see the
# documentation.
#
# html_theme_options = {}

# Add any paths that contain custom themes here, relative to this directory.
html_theme_path = [sphinx_boost.get_html_theme_path()]

# The name for this set of Sphinx documents.
# "<project> v<release> documentation" by default.
#
# html_title = u'Boost.HigherOrderFunctions v1.0'

# A shorter title for the navigation bar.  Default is the same as html_title.
#
# html_short_title = None

# The name of an image file (relative to this directory) to place at the top
# of the sidebar.
#
# html_logo = 'boost-proposed.png'

# The name of an image file (relative to this directory) to use as a favicon of
# the docs.  This file should be a Windows icon file (.ico) being 16x16 or 32x32
# pixels large.
#
# html_favicon = None

# Add any paths that contain custom static files (such as style sheets) here,
# relative to this directory. They are copied after the builtin static files,
# so a file named "default.css" will overwrite the builtin "default.css".
html_static_path = ['_static']

# Add any extra paths that contain custom files (such as robots.txt or
# .htaccess) here, relative to this directory. These files are copied
# directly to the root of the documentation.
#
# html_extra_path = []

# If not None, a 'Last updated on:' timestamp is inserted at every page
# bottom, using the given strftime format.
# The empty string is equivalent to '%b %d, %Y'.
#
# html_last_updated_fmt = None

# If true, SmartyPants will be used to convert quotes and dashes to
# typographically correct entities.
#
# html_use_smartypants = True

# Custom sidebar templates, maps document names to template names.
#
# html_sidebars = {}

# Additional templates that should be rendered to pages, maps page names to
# template names.
#
html_additional_pages = {
    'index': 'redirect.html',
}

# If false, no module index is generated.
#
# html_domain_indices = True

# If false, no index is generated.
#
# html_use_index = True

# If true, the index is split into individual pages for each letter.
#
# html_split_index = False

# If true, links to the reST sources are added to the pages.
#
html_show_sourcelink = True
html_copy_source = True

# If true, "Created using Sphinx" is shown in the HTML footer. Default is True.
#
# html_show_sphinx = True

# If true, "(C) Copyright ..." is shown in the HTML footer. Default is True.
#
# html_show_copyright = True

# If true, an OpenSearch description file will be output, and all pages will
# contain a <link> tag referring to it.  The value of this option must be the
# base URL from which the finished HTML is served.
#
# html_use_opensearch = ''

# This is the file name suffix for HTML files (e.g. ".xhtml").
# html_file_suffix = None

# Language to be used for generating the HTML full-text search index.
# Sphinx supports the following languages:
#   'da', 'de', 'en', 'es', 'fi', 'fr', 'hu', 'it', 'ja'
#   'nl', 'no', 'pt', 'ro', 'ru', 'sv', 'tr', 'zh'
#
# html_search_language = 'en'

# A dictionary with options for the search language support, empty by default.
# 'ja' uses this config value.
# 'zh' user can custom change `jieba` dictionary path.
#
# html_search_options = {'type': 'default'}

# The name of a javascript file (relative to the configuration directory) that
# implements a search results scorer. If empty, the default will be used.
#
# html_search_scorer = 'scorer.js'

# Output file base name for HTML help builder.
htmlhelp_basename = 'Boost.HigherOrderFunctionsdoc'

# -- Options for LaTeX output ---------------------------------------------

latex_elements = {
     # The paper size ('letterpaper' or 'a4paper').
     #
     # 'papersize': 'letterpaper',

     # The font size ('10pt', '11pt' or '12pt').
     #
     # 'pointsize': '10pt',

     # Additional stuff for the LaTeX preamble.
     #
     # 'preamble': '',

     # Latex figure (float) alignment
     #
     # 'figure_align': 'htbp',
}

# Grouping the document tree into LaTeX files. List of tuples
# (source start file, target name, title,
#  author, documentclass [howto, manual, or own class]).
latex_documents = [
    (master_doc, 'Boost.HigherOrderFunctions.tex', u'Boost.HigherOrderFunctions Documentation',
     u'Paul Fultz II', 'manual'),
]

# The name of an image file (relative to this directory) to place at the top of
# the title page.
#
# latex_logo = None

# For "manual" documents, if this is true, then toplevel headings are parts,
# not chapters.
#
# latex_use_parts = False

# If true, show page references after internal links.
#
# latex_show_pagerefs = False

# If true, show URL addresses after external links.
#
# latex_show_urls = False

# Documents to append as an appendix to all manuals.
#
# latex_appendices = []

# If false, no module index is generated.
#
# latex_domain_indices = True


# -- Options for manual page output ---------------------------------------

# One entry per manual page. List of tuples
# (source start file, name, description, authors, manual section).
man_pages = [
    (master_doc, 'Boost.HigherOrderFunctions', u'Boost.HigherOrderFunctions Documentation',
     [author], 1)
]

# If true, show URL addresses after external links.
#
# man_show_urls = False


# -- Options for Texinfo output -------------------------------------------

# Grouping the document tree into Texinfo files. List of tuples
# (source start file, target name, title, author,
#  dir menu entry, description, category)
texinfo_documents = [
    (master_doc, 'Boost.HigherOrderFunctions', u'Boost.HigherOrderFunctions Documentation',
     author, 'Boost.HigherOrderFunctions', 'One line description of project.',
     'Miscellaneous'),
]

# Documents to append as an appendix to all manuals.
#
# texinfo_appendices = []

# If false, no module index is generated.
#
# texinfo_domain_indices = True

# How to display URL addresses: 'footnote', 'no', or 'inline'.
#
# texinfo_show_urls = 'footnote'

# If true, do not generate a @detailmenu in the "Top" node's menu.
#
# texinfo_no_detailmenu = False

nitpicky = True

def convert_to_code_fences(lines, fence='```'):
    output = []
    incode = False
    isempty = False
    infence = False
    for line in lines:
        sline = line.strip()
        iscode = (isempty or incode) and line.startswith('    ') and not infence
        isempty = not sline
        isfence = line.startswith('```')
        if infence:
            if isfence:
                infence = False
            output.append(line)
        elif incode:
            if isempty:
                output.append(line)
            elif iscode:
                output.append(line[4:])
            else:
                output.append(fence)
                output.append('\n\n')
                output.append(line)
                incode = False
        else:
            if iscode:
                nested_list = sline.startswith(('-', '*', '+')) or sline[0].isdigit()
                x = line[4:]
                if nested_list:
                    output.append(line)
                elif x.startswith('!'):
                    output.append('{fence}{language}'.format(
                        fence=fence, language=x[1:].strip()))
                    output.append('\n')
                else:
                    output.append(fence+'cpp')
                    output.append('\n')
                    output.append(x)
                incode = not nested_list
            elif isfence:
                infence = True
                incode = False
                output.append(line)
            else:
                output.append(line)
    return '\n'.join(output)

def insert_header(lines, f):
    for line in lines:
        yield line
        if line.startswith('=='):
            yield ""
            yield "Header"
            yield "------"
            yield ""
            yield "    #include <{0}>".format(f)
            yield ""

extract_prefix = '/// '
include_dir = os.path.abspath('../include/')
def extract_doc(app, docname, source):
    path = app.env.doc2path(docname)
    if sphinxversion != "1":
        source[0] = source[0].replace('```eval_rst', '```{eval-rst}')
    if path.endswith('.hpp'):
        lines = source[0].split('\n')
        md = [line[len(extract_prefix):] for line in lines if line.startswith(extract_prefix)]
        source[0] = '\n'.join(insert_header(md, os.path.relpath(path, include_dir)))
    if path.endswith(('.hpp', '.md')):
        lines = source[0].split('\n')
        source[0] = convert_to_code_fences(lines)

# app setup hook
def setup(app):
    app.srcdir = os.path.abspath(os.path.join(app.srcdir, os.pardir))
    if sphinxversion=="1":
        app.add_config_value('recommonmark_config', {
                'enable_eval_rst': True,
                # 'enable_auto_doc_ref': True,
                'commonmark_suffixes': ['.md', '.hpp'],
                }, True)
        app.add_transform(AutoStructify)
    app.connect('source-read', extract_doc)
